Trolley.



f L. J. TETLOW.

TROLLEY.

- 1911. 1,045,758? Patented Nov.26,1912.

iran ne LWIS J. -TETLOW, QF IlJ'iEST SPRINGFIELD, MASSACHUSETTS, ASSIGNOB T0 UNIVERSAL TROLLEY ill/'HEEL MPANY, GF NQRTHAMPTON, MASSACHUSETTS, A CORPORATION 0F MASSACHUSETTS.

arnrrr ritiri]o y TROLLEY.

Losanna sled May l2,

To all whom it may concern;

Be it known that I, Lnwis J. Tnrnow, a citizen of the United States of'Anierica, and resident of West Springfield, in the county of Hampden and State of Massachusetts, have invented certain new and useful Improvements in Trolleys, of which the following is a full, clear, and exact description. v

This invention relates to trolleys for electric railway cars.

The object is to so construct the contact. springs in united pairs and to combine them within the trolley harp thata perfect contact both with the hub Iof the trolley wheel and with the harp is assured.

Other objects are to generally improve and increase the eicieiicy of the trolley in respects which will be hereinafter rendered manifest.

The invention is described in conjunction with the accompanying drawings and set fort-h in the claims.

In the drawings :-I1`igure 1 is a vertical sectional view through the trolley harp on the plane of the axle. Fig. 2 is a central Vertical sectional view at right angles to lFig. 1. The lines 1-1 and 2 2, precisely indicate thev planes on which Figs. 1 and 2 are taken.

In the drawings, A represents the trolley harp having a socket in its lower end into Whichthe upper end of the trolley pole B isfitted and secured as usual, and which end of the pole constitutes the harp base. The harp comprises the oppositely located jaws (L a which at their lower portions are made With apertures b b.

D represents the trolley wheel mounted on the axle C which is supported by the harp jaws a a as usual, vand E represents the duplicated Contact springs.

The preferred construction and manner of mounting of the united pair of Contact springs is represented in Fig. 1 of the draw-` ings, although limit-ation to this specific construction and mode of applicationis not intended to be made by me; and referring to Fig. 1, the contact spring plates have substantially parallel lower and upper extremities, the latter embracing the axle and bearing vthroughout their proximate areas on the hub ends of the Wheel, and thev said plates are outwardly oppositely bowed between their extremities so as to have re-I 'Speeication of Letters atent.

silient bearings against the inner faces of the trolley harp side members.

o represents a headedlbolt the shank. which passes through. the separated iti-wer extremities of the contact spring plates, its

engaging the bolt and bearing against the outer face ofthe other contact spring plate;

is in compression between the loosely connected lextremities of the contact spring disconnection of the loosely connected parts and to vary the tension of the spring which forms a yielding separating means between thev spring contact plates.

In the base of the trolley. harp, which as illustrated is constituted by the upper end of the trolley pole B which is tted and secured in the socket therefor iii the shank of the trolley wheel as usual, is :i vertical upwardly open cavity g iii which isl fitted a plunger r having a head cnlai'geiiient, which plunger is upwardly pressed by the spring s and is downwardly yieldable against the force of such spring; and this plunger is in constant contact engagement with the spring in metallic connection with the springcoii-` tact plates. Therefore, it is to be seen that tively broad and positive face bearing on the hub ends of the wheel, have, furthermore7 bearings at their internied-iately bulged parts with the side members of the harp, and also have metallic circuit forinin vconnections constantly with the spring p linger at the base of the harp, assuring by reason of the of the springs should vibrate or become dis-z'v ductivity at the base of the trolley.

tively large' gage wire so as to be capable of carrying the maximum current carried on the trolley wire.

and minor features of construction ofv this trolley without depart-'ing from my invention or sacrificing the advantages thereof.

I claimz- 1. AIn combination, a

of contact springs andmeans for uniting the Patented Nev. 26, ieii. semi no. 626,745. f

head bearing on oneplate and the nut 02" latter even if one or bothof the bowed parts I trolley harp. an axle'v supported thereby and a trolley wliecl, a pair and a spiral spring p encircles the bolt and plates. Thel nut operates both to prevent encircled bolt whichloosely connects and is the contact springs E E have a comparaplaced from the trolley harp cheek contacts,"v a certainty of connection for current con- The springs p and q are made of compara-l Various changes may be made iii the details los ing contact of the said contact springs with the trolley harp below thewhee 2. In combinatioma trolley harp, an axle supported thereby, and a trolley wheel, a'

pair of contact spring 'plates having substantially parallel lower extremities,l and having their upper extremities,embracing the axle and bearing ou the ends ot the'hub portion of the trolley wheel, and said plates being oppositely outwardly bowed i between their upper and lower extremities, means for connecting the pair of springs at their lower extremities, and means for imparting la yielding separating pressure to such lower extremities.

3. In combination, a'trolley harp, an axle sup-portedl thereby, -and a trolley'y wheel, a

pair of contact-l spring plates having their4 upper extremities embracing the axleand bearing on the hub ends of the trolley wheel,`

inea-ns for loosely uniting the lower extremities of the springs, spring means for exerting l n :a separating force .to such lower extremities,

and means for varying 'the -tension of the f sprinpf separating means. n,

4. In combination, a trolley harp, an axle supported thereby,l and a trolley wheel, i

, pair of contact spring plates having substantially parallel upper extremities embracing the axle and bearing on the hub ends of the trolley wheel, a headed bolt the shank of which passes loosely through separated lower extremities of the contact spring plates, its head bearing on one plate and a nut engaging the bolt and bearing against 'the other plate, and a spiral spring encircling the bolt and in compression between the loosely connected extremities of the contact spring plates.

5. In-combination, a trolley wheel, a trol ley harp having a Wheel supporting axle and having an upwardly spring pressed and downwardly yielding plunger in its base, al pair of Contact springs, the upper portions of which embrace the axle and bear faeewise on the huby ends of the trolley wheel and having' their lower portions united and in engagement with the top of said spring pressed plunger. Y

6. In combination, a trolley harp, the axle ,and` trolley wheel, a pair of contact spring plates having substantially parallel upper extremities bearing on the hub end of the wheel, a headed' bolt the shank of which passes through the separatedlowver extremi-4 ties\of thel Contact spring plates for loosely connecting the same and `rhaving a spiral sprigencireling it and in compression betwee, such lower extremities, and"'. thetrolley harp having in its base a downwardly'yieldina' plunger with'which the spring encircled bolt has a constant engagement.

Signed by me at Springeld, Mass., in

presence of two subscribing witnesses.

, LEWIS J. TETLOW. Witnesses:

WVM. S. BELLows,

G. R. DRIsooLL.

copies of this patent may be obtained for ve cents each, by addressing the. Commissioner of Patents,

Washington, D. C. 

